<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="index.css">
</head>
<body>
    <input type="checkbox" name="" id="checkbox">
    <label for="checkbox">
        <span></span>
    </label>
    <div class="background"></div>
</body>
</html>
